Despatch Protocol 3 Modbus Communications - Manual (Page 3)

Modbus Programming Manual P REFACE
Version 2 3
Copyright © 2012 by Despatch Industries.
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Table of Contents
1.
About This Manual ............................................................................................................. 5
1.1. Important User Information ..................................................................................... 5
1.2. Manufacturer & Service .......................................................................................... 5
1.3. Organization of this Manual .................................................................................... 6
1.3.1. Reference Documents .......................................................................................... 6
1.4. Serial Communications ........................................................................................... 6
1.4.1. Supported Protocols ............................................................................................. 6
1.4.2. RS485 Configuration ........................................................................................... 6
1.4.3. RS485 Device Addressing ................................................................................... 7
1.4.4. Ethernet Configuration ........................................................................................ 7
1.4.5. Link Layer ........................................................................................................... 8
1.4.6. Supported Modbus Functions .............................................................................. 9
1.4.7. Function Descriptions .......................................................................................... 9
1.4.8. Data Formats ..................................................................................................... 12
2. Modbus Address List ........................................................................................................ 13
2.1. Input Parameters .................................................................................................... 13
2.1.1. Process Input Parameters ................................................................................... 13
2.1.2. High Limit Input Parameters ............................................................................. 14
2.1.3. Digital Inputs ..................................................................................................... 16
2.2. Output Parameters ................................................................................................. 16
2.2.1. Relay Output 1 Parameters ................................................................................ 16
2.2.2. Relay Output 2 Parameters ................................................................................ 17
2.2.3. Relay Output 3 Parameters ................................................................................ 18
2.2.4. Relay Output 4 Parameters ................................................................................ 18
2.2.5. Relay Output 5 Parameters ................................................................................ 19
2.2.6. Linear Output Parameters .................................................................................. 20
2.3. Setpoint Parameters ............................................................................................... 21
2.4. Control Parameters ................................................................................................ 22
2.5. Alarm Parameters .................................................................................................. 24
2.5.1. Alarm 1 .............................................................................................................. 24
2.5.2. Alarm 2 .............................................................................................................. 24
2.5.3. Alarm 3 .............................................................................................................. 25
2.5.4. Alarm 4 .............................................................................................................. 25
2.5.5. Alarm 5 .............................................................................................................. 26
2.5.6. High Limit Alarm Parameters ........................................................................... 26
2.6. Logger parameters (Data Logger) ......................................................................... 28
2.6.1. Data Recorder .................................................................................................... 28
2.6.2. Real Time Clock ................................................................................................ 28
2.7. Display Parameters ................................................................................................ 29
2.7.1. Keys ................................................................................................................... 29
2.7.2. LEDs .................................................................................................................. 29
2.7.3. HMI ................................................................................................................... 29
2.7.4. System Data ....................................................................................................... 30
2.8. Mode Controls ....................................................................................................... 32
2.8.1. General Mode Control ....................................................................................... 32
2.8.2. Manual Mode Parameters .................................................................................. 32